package netty.groupChat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

/**
 * description:
 * author:zt
 * date:2021-09-22
 */
public class GroupChatServer {
    private int port;

    public GroupChatServer(int port) {
        this.port = port;
    }

    //run方法，处理客户端的请求
    public void run() throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup(); //默认线程8
        try{
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup,workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG,128)
                    .childOption(ChannelOption.SO_KEEPALIVE,true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            ChannelPipeline pipeline = socketChannel.pipeline();
                            //向pipeline加入解码器
                            pipeline.addLast("decoder",new StringDecoder());
                            //向pipeline加入编码器
                            pipeline.addLast("encoder",new StringEncoder());
                            //加入自己的业务处理handler
                            pipeline.addLast(new GroupChatServerHandler());
                        }
                    });

            System.out.println("netty 服务器启动");

            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();
            //监听关闭事件
            channelFuture.channel().closeFuture().sync();
        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }

    public static void main(String[] args) throws InterruptedException {
        new GroupChatServer(7000).run();
    }
}
